Method for manufacturing water absorption treatment material

A method for manufacturing a water absorption treatment material made of a plurality of grains, comprising:

• a preparing step of preparing a paper powder to which water-absorbent polymers adhere, the paper powder being derived from a sanitary product;
• a separating step of separating part of water-absorbent polymers from the paper powder adhered with water-absorbent polymers to provide a paper powder adhered with remaining water-absorbent polymers and a particle of separated water-absorbent polymers;
• a first pulverizing step of pulverizing remaining polymers that are the water-absorbent polymers remaining on the paper powder, using a first pulverizer;
• a core portion forming step of forming a granular core portion constituting each of the grains;
• and
• a coating portion forming step of forming a coating portion so as to cover the core portion, the coating portion containing the paper powder and the remaining polymers pulverized in the first pulverizing step,
• wherein, in the first pulverizing step, the remaining polymers left in a state of adhering to the paper powder are subjected to the first pulverizer.